热力发电2017，Vol.46Issue(6)：62-68,7.DOI:10.3969/j.issn.1002-3364.2017.06.062
基于给水温度前馈的中间点焓值模糊控制系统
Fuzzy control system for intermediate point enthalpy based on feedforward of feed-water temperature
摘要
Abstract
The control quality of the intermediate point enthalpy of supercritical units directly affects the control quality of water-fuel ratio and main-steam temperature of the once-through boilers, it also relates to economic and stable operation of the supercritical units. In order to realize high quality control for the intermediate point enthalpy, this paper proposed a fuzzy control scheme for intermediate point enthalpy of the feed-water temperature, which overcomes the contradiction between the quick response of the intermediate point enthalpy control and the stability of separation interface of the separator. In this method, a mechanism model of the once-through boiler in a 600 MW supercritical unit is adopted as the control object, the feed-water temperature is introduced into the intermediate point enthalpy control system model, and two widely used control schemes (modifying feed-water quantity and modifying feed-coal quantity) for water-coal ratio are combined via fuzzy control. The simulation results show that, the improved intermediate point enthalpy control system for feed-water temperature has advantages of both rapid response in feed-water quantity control and stability in feed-coal quantity control, which effectively considers both the economy and safety during the regulation and gains satisfied control effect.关键词
超临界机组/直流锅炉/水煤比/前馈/模糊控制/中间点焓值/给水温度Key words
supercritical unit/once-through boiler/water-fuel ratio/feed-forward/fuzzy control/intermediate point enthalpy/feedwater temperature分类
能源科技引用本文复制引用
杨子豪,张燕平,高伟..基于给水温度前馈的中间点焓值模糊控制系统[J].热力发电,2017,46(6):62-68,7.基金项目
国家重点基础研究发展计划项目(973 计划)(2015CB251504) National Basic Research Program of China (973 Program) (2015CB251504) （973 计划）
